May in Aldan is the rainiest and the windiest month of the year. In May, the weather in Aldan is typically cold. Average daily high temperature in May is about 7 degrees above zero. On average, Aldan has 26 rainy, 3 sunny, and 2 cloudy days in May. The rains are usually moderate. May as well as January, February, March, and September is considered the most uncomfortable time to visit Aldan.